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Dinghushan | Family List | Rubiaceae | Mussaenda

Mussaenda pubescens Ait. f.

玉叶金花

Description from Flora of China

Mussaenda bodinieri H. Léveillé & Vaniot; M. pubescens var. alba X. F. Deng & D. X. Zhang; M. pubescens f. clematidiflora Chun ex H. H. Hsue & H. Wu.

Climbing shrubs, often extensively twining; branches terete, densely strigillose and sometimes also villosulous, sometimes with congested groups of leaves borne on reduced axillary buds. Leaves opposite or perhaps rarely whorled; petiole 3-8 mm, moderately to densely strigillose; blade drying membranous or thinly papery, ovate-oblong, ovate-lanceolate, elliptic, lanceolate, or oblanceolate, 2-9 × 1-4 cm, adaxially sparsely strigillose to glabrescent on lamina and moderately to densely strigillose on veins, abaxially sparsely to densely strigillose with pubescence denser on veins, base acute to obtuse, apex acute to slightly acuminate; secondary veins 4-7 pairs, tertiary venation reticulate; stipules usually deciduous, triangular, 3-7 mm, moderately to densely strigillose, deeply 2-lobed, lobes narrowly triangular to subulate. Inflorescences terminal, subcapitate to congested-cymose, unbranched or sometimes tripartite, 1-3 × 1-3 cm, densely strigillose to villosulous, sessile to pedunculate; peduncles 0.1-1.4 cm; bracts linear, 3-5 mm; pedicels to 1 mm. Flowers sessile or infrequently pedicellate, biology not noted. Calyx moderately to densely strigillose to strigose; hypanthium portion ellipsoid to turbinate, 1.5-3 mm; lobes linear to narrowly triangular, 3-6 mm, with 1(or 5) lobes on 1-3 flowers per inflorescence of some plants expanded into white calycophyll, blade elliptic, broadly elliptic, ovate, or lanceolate, (0.4-)2.5-5 × (0.2-)2-3.5 cm, sparsely to moderately puberulent or strigillose on both surfaces, base acute to rounded, stipe 3-28 mm, apex obtuse to acute. Corolla white or yellow, salverform, outside moderately to densely strigillose or strigose; tube 11-20 mm, densely clavate pubescent in throat; lobes oblong-lanceolate to lanceolate, 2.5-4 mm, adaxially densely golden yellow papillose, acuminate. Berry subglobose, 8-10 × 6-7.5 mm, sparsely strigillose to glabrescent, smooth or finely lenticellate, calyx limb caducous, sometimes stipitate with stipe to 5 mm. Fl. Apr-Jul, fr. Jun-Dec.

This species is widespread, common, and morphologically variable. H. H. Hsue and H. Wu (in FRPS 71(1): 296. 1999) described the leaf arrangement as opposite or whorled, but only opposite leaves have been seen on the numerous specimens studied.

One plant from Guangdong (Gaoyao) has all five of the calyx lobes petaloid and enlarged on each flower, though these structures are smaller than calycophylls that are borne singly on a flower. These plants have been separated as Mussaenda pubescens f. clematidiflora; this case was studied by Deng and Zhang (Acta Phytotax. Sin. 44: 611. 2006), who concluded that this plant is better regarded as developmentally abnormal and formally synonymized this name here. Plants with white corollas have been separated as M. pubescens var. alba; at least a third of the specimens of M. pubescens studied belong to this group, and considering that this color variation is common in other Rubiaceae species the variety is not recognized taxonomically here.

Thickets in ravines, on hill slopes, or at village margins or roadsides; below 100-900 m. Fujian, Guangdong, Guangxi, Hainan, Hunan, Jiangxi, Taiwan, Zhejiang [Vietnam].

生活型: 灌木, 藤本

栽培植物: 野生

特征: 攀援状灌木;茎叶被柔毛,与散玉叶金花近似,但叶及白色瓣状萼裂片较小,叶宽1--2厘米,长惰圆形,基部楔形

花期: 春夏间

生境: 生于疏林或灌丛中

用途: 茎叶药用,清热解毒,生津止渴、消暑利湿,治流感、支气管炎、咽喉炎、肠炎腹泻等;兽医用治风热感冒,外洗疮疡等;民间有取茎叶代茶叶

门中名: 种子植物门

亚门中名: 被子植物亚门

纲中名: 双子叶植物纲

中文别名: 白纸扇、雌蕊(高要)、凉口烟(新兴)


 

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